<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
	<meta http-equiv="X-UA-Compatible" content="IE=edge">
	<title></title>
	<link rel="stylesheet" href="">
</head>
<body>
	<script type="text/javascript">
		console.dir(Object);

		console.dir({});

		console.log({}.__proto__ === Object.prototype);

		console.dir([]);
		console.dir(function(){});
		console.dir(new String('kaivon'));

		console.dir(new String(12));

		Object.wechat = 'kaivon';
		Object.prototype.showName = () => console.log('梁海江');

		console.dir(Object);

		const obj = {};
		console.log(obj.wechat);

		obj.showName();

		let [num,s,b,u,n] = [12,'str',true,undefined,null];
		console.log(new Object(num),typeof new String(num));
		console.log(new Object(s),typeof new String(s));
		console.log(new Object(b),typeof new String(b));
		console.log(new Object(u),typeof new String(u));
		console.log(new Object(n),typeof new String(n));

	</script>
</body>
</html>